1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index c8442b86df94..9a816dbec613 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -1695,6 +1695,7 @@ static int hns3_get_tunable(struct net_device *netdev,
 			    void *data)
 {
 	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
 	int ret = 0;
 
 	switch (tuna->id) {
@@ -1705,6 +1706,9 @@ static int hns3_get_tunable(struct net_device *netdev,
 	case ETHTOOL_RX_COPYBREAK:
 		*(u32 *)data = priv->rx_copybreak;
 		break;
+	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
+		*(u32 *)data = h->kinfo.tx_spare_buf_size;
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;
@@ -1713,11 +1717,43 @@ static int hns3_get_tunable(struct net_device *netdev,
 	return ret;
 }
 
+static int hns3_set_tx_spare_buf_size(struct net_device *netdev,
+				      u32 data)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	int ret;
+
+	if (hns3_nic_resetting(netdev))
+		return -EBUSY;
+
+	h->kinfo.tx_spare_buf_size = data;
+
+	ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
+	if (ret)
+		return ret;
+
+	ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
+	if (ret)
+		return ret;
+
+	ret = hns3_reset_notify(h, HNAE3_INIT_CLIENT);
+	if (ret)
+		return ret;
+
+	ret = hns3_reset_notify(h, HNAE3_UP_CLIENT);
+	if (ret)
+		hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
+
+	return ret;
+}
+
 static int hns3_set_tunable(struct net_device *netdev,
 			    const struct ethtool_tunable *tuna,
 			    const void *data)
 {
 	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	u32 old_tx_spare_buf_size, new_tx_spare_buf_size;
 	struct hnae3_handle *h = priv->ae_handle;
 	int i, ret = 0;
 
@@ -1736,6 +1772,26 @@ static int hns3_set_tunable(struct net_device *netdev,
 			priv->ring[i].rx_copybreak = priv->rx_copybreak;
 
 		break;
+	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
+		old_tx_spare_buf_size = h->kinfo.tx_spare_buf_size;
+		new_tx_spare_buf_size = *(u32 *)data;
+		ret = hns3_set_tx_spare_buf_size(netdev, new_tx_spare_buf_size);
+		if (ret) {
+			int ret1;
+
+			netdev_warn(netdev,
+				    "change tx spare buf size fail, revert to old value\n");
+			ret1 = hns3_set_tx_spare_buf_size(netdev,
+							  old_tx_spare_buf_size);
+			if (ret1) {
+				netdev_err(netdev,
+					   "revert to old tx spare buf size fail\n");
+				return ret1;
+			}
+
+			return ret;
+		}
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;